31101021113 has 2 divisors, whose sum is σ = 31101021114. Its totient is φ = 31101021112.

The previous prime is 31101021097. The next prime is 31101021137. The reversal of 31101021113 is 31112010113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19495699129 + 11605321984 = 139627^2 + 107728^2 .

It is a cyclic number.

It is not a de Polignac number, because 31101021113 - 2⁴ = 31101021097 is a prime.

It is not a weakly prime, because it can be changed into another prime (31101021163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15550510556 + 15550510557.

It is an arithmetic number, because the mean of its divisors is an integer number (15550510557).

Almost surely, 2^31101021113 is an apocalyptic number.

It is an amenable number.

31101021113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31101021113 is an equidigital number, since it uses as much as digits as its factorization.

31101021113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31101021113 its reverse (31112010113), we get a palindrome (62213031226).

The spelling of 31101021113 in words is "thirty-one billion, one hundred one million, twenty-one thousand, one hundred thirteen".